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Barista. The tripartite graph represents the protein identification problem, with layers corresponding to spectra (gold), peptides (blue), and proteins (red). Barista computes a parameterized nonlinear function f(·) on each PSM feature vector φ(e,s). The score assigned to a peptide is the maximum PSM score associated with it. The score assigned to a protein is a normalized sum of its peptide scores.
